1. How will you separate a mixture
containing kerosene and petrol
(difference in their boiling points
is more than 25°C), which are
miscible with each other?
2. Name the technique to separate
(i) butter from curd,
(ii) sult from sea-water,
(iii) camphor from salt.
3. What type of mixtures are
separated by the technique of
crystallisation?
Answers
Explanation:
1 . Simple distillation can be used when the temperature difference between the boiling points of two miscible liquid is at least 25oC. The temperature difference between the boiling points of kerosene and petrol is 25oC. Hence, this mixture can be separated using simple distillation.
2. The technique used to separate butter from curd is centrifugation.
ii. A salt evaporation pond is a shallow artificial salt pan designed to extract salts from sea water or other brines. ... The seawater or brine is fed into large ponds and water is drawn out through natural evaporation which allows the salt to be subsequently harvested.
iii.Sublimation is the process which is used to separate the mixture of camphor and salt.
3 . Crystallization is also a chemical solid-liquid separation technique, in which mass transfer of a solute from the liquid solution to a pure solid crystalline phase occurs." Therefore, crystallization is used to separate a solid-liquid mixture
Answer:
by using simple distillation
Explanation:
can be used when the temperature difference between the boiling point of the two miscile liquid is at least 25c